Name:
Lab Partner:
Date:
Ground State Electron Configurations, Nobel Gas Configurations,
Orbital Diagrams and Electron Dot Structures
OBJECTIVES





Write ground state electron configurations of elements.
Write nobel gas configurations of elements.
Draw orbital diagrams of elements.
Draw electron dot structures of elements.
Identify elements based on their ground state electron configurations and nobel gas
configurations.
1. Write ground-state electron configurations for the following elements.
A .Br
B. Sr
C. Sb
D. Zr
E. Cu
F. Pt
Bromine - 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p5
Strontium - 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2
Antimony - 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p3
Zirconium - 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d2
Copper - 1s2 2s2 2p6 3s2 3p6 4s2 3d9
Platinum - 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d7
2. How many electrons are in orbitals related to the third energy level of a sulfur atom? 6
3. How many electrons occupy p orbitals in a chlorine atom? 11
4. What element has the following ground-state electron configuration? [Kr]5s24d105p1
Indium
5. What element has the following ground-state electron configuration? [Xe]6s2 Barium
6. Draw electron-dot structures for atoms of the following elements.
A. magnesium
B. rubidium
D. sulfur
E. thallium
C. xenon
F. bromine
7. Write orbital notations and complete electron configurations for atoms of the following elements.
a. beryllium
b. aluminum
c. nitrogen
d. sodium
Beryllium – 1s2 2s2
1s2
↑↓
2s2
↑↓
2p6
3s2
Aluminum – 1s2 2s2 2p6 3s2 3p1 ↑↓
↑↓
↑↓
↑↓
↑↓
Nitrogen – 1s2 2s2 2p3
↑↓
↑↓
↑
↑
↑
Sodium – 1s2 2s2 2p6 3s1
↑↓
↑↓
↑↓
↑↓
↑↓
↑↓
↑
3p6
↑
8. Use noble-gas notation to describe the electron configurations of the elements represented by the
following symbols.
a. Mn
b. Kr
c. P
d. Zn
e. Zr
Manganese – [Ar] 4s2 3d5
Krypton – [Ar] 4s2 3d10 4p6
Phosphorus - [Ne] 3s2 3p3
Zinc – [Ar] 4s2 3d10
Zirconium – [Kr] 5s2 4d2
9. What elements are represented by each of the following electron configurations?
A. 1s22s22p5
B. [Xe]6s24f4
C. [Rn]7s25f13
2
2
10
4
D. [Ar]4s
E. [Kr]5s 4d 5p
F. 1s22s22p63s23p64s23d104p5
A .Fluorine
B. Neodymium
C. Mendelevium
D. Calcium
E. Tellerium
F. Bromine
10. Draw electron-dot structures for atoms of each of the following elements.
carbon
arsenic
polonium
potassium
barium